updated for version 7.3.013

Problem:    Dynamic loading with Ruby doesn't work for 1.9.2.
Solution:   Handle rb_str2cstr differently.  Also support dynamic loading on
            Unix. (Jon Maken)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    13,
 /**/
     12,
 /**/